<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!--  -->
        <el-card>
            <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
            <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echart，但是我已经通过npm命令安装了
// npm install echarts --save
import * as echarts from 'echarts' 
// 导入lodash
import _ from 'lodash'

export default {
    data(){
        return{
            // 需要合并的数据
            options: {
                title: {
                    text: '用户来源'
                },
                tooltip: {
                    trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                         backgroundColor: '#E9EEF3'
                        }
                    }
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [
                    {
                        boundaryGap: false
                    }
                ],
                yAxis: [
                    {
                         type: 'value'
                     }
                ]
            }
        }
    },
    methods:{

    },
   
    created(){},
     // 2.此时页面上的元素，已经被渲染完毕了
    async mounted(){
         // 3.基于准备好的dom，初始化echarts实例
         var myChart = echarts.init(document.getElementById('main'));

         const {data:res} = await this.$http.get('reports/type/1')
         if(res.meta.status !== 200){
             return this.$message.error('获取这项图数据失败！')
         }
        //  4.准备数据和配置项
        const result = _.merge(res.data,this.options)

        // 展示数据
        // myChart.setOption(res.data);
        myChart.setOption(result);

    }
}
</script>

<style scoped>

</style>